testsuite/synth: add a test for previous commit.

3 files changed, 68 insertions, 1 deletions

diff --git a/testsuite/synth/forgen01/forgen03.vhdl b/testsuite/synth/forgen01/forgen03.vhdl
new file mode 100644
index 000000000..1a4828302
--- /dev/null
+++ b/testsuite/synth/forgen01/forgen03.vhdl
@@ -0,0 +1,38 @@
+library ieee;
+use ieee.std_logic_1164.all;
+
+entity fulladder is
+  port (a, b, ci : std_logic;
+        o, co : out std_logic);
+end fulladder;
+
+architecture behav of fulladder is
+begin
+  o <= a xor b xor ci;
+  co <= (a and b) or (a and ci) or (b and ci);
+end behav;
+
+library ieee;
+use ieee.std_logic_1164.all;
+
+entity forgen03 is
+  generic (l : natural := 8;
+           structural : boolean := true);
+  port (a, b : std_logic_vector (l - 1 downto 0);
+        o : out std_logic_vector (l - 1 downto 0));
+end forgen03;
+
+architecture behav of forgen03
+is
+begin
+  gstr: if structural generate
+    signal carry : std_logic_vector (l downto 0);
+  begin
+    carry (0) <= '0';
+    gadd: for i in 0 to l - 1 generate
+      iadd: entity work.fulladder
+        port map (a => a (i), b => b (i), ci => carry (i),
+                  o => o (i), co => carry (i + 1));
+    end generate;
+  end generate;
+end behav;
diff --git a/testsuite/synth/forgen01/tb_forgen03.vhdl b/testsuite/synth/forgen01/tb_forgen03.vhdl
new file mode 100644
index 000000000..d03046781
--- /dev/null
+++ b/testsuite/synth/forgen01/tb_forgen03.vhdl
@@ -0,0 +1,29 @@
+entity tb_forgen03 is
+end tb_forgen03;
+
+library ieee;
+use ieee.std_logic_1164.all;
+
+architecture behav of tb_forgen03 is
+  signal a : std_logic_vector (7 downto 0);
+  signal b : std_logic_vector (7 downto 0);
+  signal o : std_logic_vector (7 downto 0);
+begin
+  dut: entity work.forgen03
+    port map (a, b, o);
+
+  process
+  begin
+    a <= x"30";
+    b <= x"28";
+    wait for 1 ns;
+    assert o = x"58" severity failure;
+
+    a <= x"11";
+    b <= x"f7";
+    wait for 1 ns;
+    assert o = x"08" severity failure;
+
+    wait;
+  end process;
+end behav;
diff --git a/testsuite/synth/forgen01/testsuite.sh b/testsuite/synth/forgen01/testsuite.sh
index cbc0107c7..d9818a2e2 100755
--- a/testsuite/synth/forgen01/testsuite.sh
+++ b/testsuite/synth/forgen01/testsuite.sh
@@ -2,7 +2,7 @@
 
 . ../../testenv.sh
 
-for t in forgen01 forgen02; do
+for t in forgen01 forgen02 forgen03; do
     analyze $t.vhdl tb_$t.vhdl
     elab_simulate tb_$t
     clean